PBS aired this 6-hour series as three 2-hour episodes on consecutive nights last week (April 10/11/12). Yet under the 'specials' tab on the PBS On-Demand page for SD, only the first item appears. ( I couldn't even get that one to appear under Search, as it didn't match "Great War" or "The Great".)
Now I see that all 3 are available on HD. Aaargh....
...So this is yet another case, across numerous network providers, of "only SD missing" problems.
Can't Comcast do it's own video downsampling of HD to create SD ???
I would also like to see parts 2 & 3, in SD. I've found I have to search "AMERICAN E"xperience to return any "The Great War" content. It can not be found in the corresponding "Shows A - C" folder; neither SD nor HD.